[PR #10542/e1d2d77c backport][3.12] only use AI_ADDRCONFIG
when supported by getaddrinfo
#10579
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This is a backport of PR #10542 as merged into master (e1d2d77).
The fallback implementation for getaddrinfo in CPython doesn't support
AI_ADDRCONFIG
and currently fails with a bad flags error. This changes the implementation to only set the flag if it's part ofAI_MASK
. SinceAI_MASK
isn't necessarily available either this has to be checked first.